NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, I-56126 Pisa, Italy.
Phys Rev Lett. 2011 Sep 30;107(14):146404. doi: 10.1103/PhysRevLett.107.146404.
We explain effective charge anomalies recently observed for fractional quantum Hall edge states at ν=5/2 [M. Dolev, Y. Gross, Y. C. Chung, M. Heiblum, V. Umansky, and D. Mahalu, Phys. Rev. B 81, 161303(R) (2010)]. The experimental data of differential conductance and excess noise are fitted, using the anti-Pfaffian model, by properly taking into account renormalizations of the Luttinger parameters induced by the coupling of the system with an intrinsic 1/f noise. We demonstrate that a peculiar agglomerate excitation with charge e/2, double the expected e/4 charge, dominates the transport properties at low energies.
我们解释了最近在ν=5/2 处观察到的分数量子霍尔边缘态的有效电荷异常[M. Dolev、Y. Gross、Y. C. Chung、M. Heiblum、V. Umansky 和 D. Mahalu，Phys. Rev. B 81, 161303(R) (2010)]。使用反 Pfaffian 模型，通过适当考虑系统与固有 1/f 噪声耦合引起的 Luttinger 参数的重整化，对微分电导和超额噪声的实验数据进行拟合。我们证明，在低能下，具有电荷 e/2（预期电荷 e/4 的两倍）的奇特聚集体激发主导了输运性质。
